Specifications

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2.1.4. Audio
Basic Specifications
WAV playback, voice recording and playback are supported.
When headphones are being used, playback from the speaker is halted. Stereo data is converted
into mono data and then output. By using the Microsoft SoftwareMixer function, output sounds
from multiple applications can be mixed and output (in 44.1 KHz, 16-bit stereo mixing).
Voice Recorder is integrated in the terminal as the sound system application to make it possible to
perform WAV file streaming playback and local file playback in HTTP.
Playback
Table. 2.8
KHz 8 11.025 12 16 22.05 24 32 44.1 48
Mono Yes Yes Yes Yes Yes Yes Yes Yes Yes
Stereo Yes Yes Yes Yes Yes Yes Yes Yes Yes
Sampling
frequencies
Sampling frequencies other than those above are not supported.
Stereo, Mono
8-bit or 16-bit
In reality, mono speakers do not playback in stereo.
Recording
Table. 2.9
KHz 8 11.025 12 16 22.05 24 32 44.1 48
Mono Yes Yes Yes Yes Yes Yes Yes Yes Yes
Sampling
frequencies
Sampling frequencies other than those above are not supported.
Stereo, Mono
8-bit or 16-bit
Mono input only via microphone
Setting Sound Volume
The control panel can be used to set up sound volume in six grades from loud to low and ON/OFF
of mute. A sound volume also can be set up using Win32 API function in application.
Audio ON/OFF
The audio system can be disabled to save the power. Enable or disable for the audio system in the
terminal is controlled using the Common Device Control Library in application.